Medically reviewed by
Medically reviewed by
Dr Amanda Northridge
GP & Medical Reviewer·MBBS·GMC 2847829
Exhausted all the time and no obvious reason why? Speak to a GP today about fatigue — a clear assessment, blood tests arranged where appropriate, and a plan to get to the bottom of it.
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Enough to work through your history and decide which blood tests you need. Your GP can issue a blood-test request for you to book at a lab.
For a physical exam and blood pressure check in person — same-day appointments in Manchester.
A qualified GP takes a full history, asks about sleep, stress and other symptoms, and works out what's most likely. Video or in-clinic.
If blood tests would help, your GP can arrange a core fatigue panel — full blood count, ferritin, thyroid function, vitamin D, B12 and HbA1c. Results typically come back in a few working days and are reviewed by your GP.
Results explained by your GP, treatment plan where a cause is found, and a referral for anything that needs specialist input.
Tiredness has dozens of possible causes and most of them are treatable. A GP visit plus the right blood tests is usually all it takes to rule out the big ones and start you on a plan.
Feeling constantly tired is one of the most common reasons people see a GP — and one of the most common things patients self-silence about. Fatigue can be driven by sleep, stress, diet and lifestyle — or it can be the first sign of anaemia, thyroid problems, diabetes, low vitamin D or B12, or something else worth investigating. A GP can work through the likely causes and arrange blood tests where appropriate. Common causes include:
Sudden severe breathlessness, chest pain, weakness or collapse needs urgent care — call 999 or go to A&E straight away. These aren't just fatigue.
Tiredness can also point to iron-deficiency anaemia, thyroid problems, sleep problems or low mood and anxiety. These usually need blood tests or a longer GP discussion to tell apart — your GP will work through the likely ones with you.
Often yes — a GP can take a full history, examine you and arrange the right blood tests in a single appointment. The diagnosis itself usually comes once the bloods are back, but you'll leave the visit with a clear plan, a request form and a sense of the most likely causes.
Most fatigue work-ups include full blood count, ferritin, thyroid function, vitamin D, vitamin B12 and HbA1c — your GP may add others based on your history. Turnaround depends on the lab and tests requested; your GP will share the timeline at your appointment and follow up with the results and next steps.
For some causes — iron supplements, sleep advice, a sick note, or a referral — yes, your GP can set treatment in motion in the same appointment. For others, treatment depends on bloods or a specialist opinion, so the same-day step is the assessment plus the right tests.
If you've been unusually tired for more than 2–4 weeks with no obvious cause — no recent illness, no big life change, normal sleep — it's worth a review. Tiredness that's getting worse, stopping you functioning, or paired with weight change, low mood or physical symptoms doesn't need to wait.
Maybe — but not always. Stress, anxiety and low mood cause real physical tiredness. A GP takes those seriously while also ruling out physical causes first. Getting bloods done rules out the medical causes so you can focus on the rest.
That's common — and it's useful information. It rules out the big physical causes and lets your GP look more carefully at sleep, mood, stress, diet, or post-viral recovery. There are treatments for each.
Video or in-clinic, 15 minutes. Your GP takes a focused history, examines you, and explains what they think is going on.
Blood tests, swabs, urine samples or imaging — your GP arranges what fits and shares the timeline at the appointment.
Treatment arranged with your pharmacy after the call. Sick notes issued at the visit. Specialist referral letters written the same day when needed.
Sources: NHS Tiredness and fatigue · NICE CKS Tiredness/fatigue in adults